I don't know the width and backspacing of my rallye wheels. I would assume 5.5" or 6" width, and am assuming about a 3.5" backspace, but would have to pull them off and measure to confirm. They were on the car when I bought it, and I've never really had a reason to measure.
Cass recommended 4.25 - 4.5" backspace on wheels using his kits.
